adj puny; petty; unskilled.
2. puisne ·adj later in age, time, ·etc.; subsequent.
3. puisne ·noun one who is younger, or of inferior rank; a junior; ·esp., a judge of inferior rank.
4. puisne ·adj younger or inferior in rank; junior; associate; as, a chief justice and three puisne justices of the court of common pleas; the puisne barons of the court of exchequer.